Cardiologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Chiropractor providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Dentist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Dermatologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Family Physician providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
OB-GYN providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Ophthalmologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Orthopedic Surgeon providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Pediatrician providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Physical Therapist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Podiatrist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Psychiatrist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Dr. Karen Mass, MD, FACOG, is a dedicated and experienced doctor of medicine and Fellow of the American Congress of Obstetricians and Gynecologists at Women's Specialty Care SC.
From two offices in Lake Forest and Grayslake, Illinois, Dr. Mass provides personal, expert, and compassionate care to all patients. She is the founder and President of Women's Specialty Care SC, one of the premier women’s health medical practices of the north shore of Chicago since 2002.
Learning and furthering education has always been a passion for Dr. Mass. She began her medical studies at the University of Illinois at Chicago (UIC). Next, she pursued specialty training in Gynecology and Obstetrics at the University of Michigan (UMich), in Ann Arbor.
She was appointed administrative chief resident in the department of Obstetrics and Gynecology at the University of Michigan in Ann Arbor,, Michigan, and her first academic appointment was as Assistant Professor at the University of Pittsburgh (Pitt) in Pittsburgh, Pennsylvania.
Dr. Mass is currently appointed as clinical faculty at Northwestern University Feinberg School of Medicine (NU Feinberg) in Chicago, Illinois. She serves as the medical staff attending at Northwestern Medicine Lake Forest and NorthShore Highland Park hospitals.
She is a member of the North American Menopause Society (NAMS), Alpha Omega Alpha (AOA) Medical Honor Society, and Phi Beta Kappa. Dr. Mass is certified in Bone Densitometry from the International Society for Clinical Densitometry (ISCD).
With close ties to the community, Dr. Mass is pleased to be serving the residents of Lake Forest, Grayslake, and surrounding areas. She is a resident and has raised her family in the City of Lake Forest.
She warmly welcomes patients to Women's Specialty Care SC and looks forward to caring for them.
Dr. Elizabeth Oh, MD, FACOG, is a board-certified OB/GYN. She has been a dedicated member of the practice since 2004.
Dr. Oh earned her undergraduate degree in psychology from Northwestern University before obtaining her medical degree from the University of Illinois at Chicago in 2000. She then completed her OB/GYN residency at the University of Chicago Hospitals, where she served as academic chief resident. She is board certified by the American Board of Obstetrics and Gynecology.
Passionate about patient care, Dr. Oh has special interests in adolescent health, abnormal pap smears, menstrual irregularities, ablations, and minimally invasive surgery. She values the relationships she builds with her patients, taking the time to understand their unique needs, concerns, and joys through every stage of life.
Outside of work, Dr. Oh enjoys an active lifestyle. She is an avid runner and also enjoys golf, tennis, and reading fiction novels. Fluent in Korean, she cherishes time spent with her husband, two children, and beloved dog, Cocoa Bear.
Maureen Tart, MD, FACOG, MSCP, is a board-certified OB/GYN. Before joining the practice in 2011, Dr. Tart practiced in Chicago for over a decade. She served as Co-Medical Director of her group and held the role of Vice Chair of the OB/GYN department for several years.
Originally from Connecticut, Dr. Tart moved to Chicago for her residency training and has since built a career dedicated to women’s health. She earned both her undergraduate degree in psychology and her medical degree from Georgetown University before completing her residency in Obstetrics and Gynecology at the University of Chicago Hospitals. During her residency, she served as the academic chief resident and trained alongside Dr. Heather B. Heiberger, MD, FACOG, and Dr. Elizabeth Oh, MD, FACOG.
Dr. Tart has a special interest in adolescent health, weight management, infertility care, and menopause management. As a MSCP - Menopause Society Certified Practitioner, she is dedicated to guiding patients through every stage of life with personalized, compassionate care. She views her role as an OB/GYN as a partnership—helping patients navigate their health from adolescence through menopause while building lasting relationships with them and their families.
Outside of work, Dr. Tart stays busy with her boys, two Spring Spaniels, yoga, and racquet sports. Her youngest was adopted domestically, which has made adoption advocacy a cause close to her heart. Her decision to move to the suburbs was driven by her children, ensuring they had the best environment to grow and thrive.
“I have been seeing her for a couple of years I started seeing her when my previous Gyne didn't seem to take my menopause symptoms seriously. Dr Tart always is talking about new research & how they have updated their protocols & tests. I like that they continue to evolve around new research.
She always listens to me with my concerns & gives great medical advice. If you want to focus on a healthy life style & believe in preventive medicine , then this is the place for you”
Dr. Maureen Tart, MD
OB-GYN
36100 N. Brookside Drive
Suite 204
Gurnee, IL 60031
4.93(1411)
Dr. Mary Faith Terkildsen, MD
OB-GYN 48.1 mi
36100 N. Brookside Drive
Suite 204
Gurnee, IL 60031
Dr. Mary Faith Terkildsen is a board-certified OB/GYN and AASECT certified sex counselor who is passionate about helping women feel their best at every stage of life, with a special focus on sexual wellness and menopause care.
Dr. Terkildsen earned both her undergraduate degree in psychology and neuroscience and her medical degree from Tulane University, then completed her OB/GYN residency at Northwestern University’s Prentice Women’s Hospital, where she served as administrative chief resident.
Over the years, she discovered that many women have questions about sexual health that aren’t often addressed in traditional medical care. Wanting to change that, she pursued additional training at the University of Michigan and became certified by the American Association of Sexuality Educators, Counselors, and Therapists (AASECT). In 2022, she launched a Women’s Sexual Health program and partnered with the Kellogg Cancer Center to support women during and after cancer treatment. Inspired by her patients’ needs, she expanded her work to include menopause and hormone therapy, earning her Menopause Society Certified Practitioner (MSCP) designation in 2025.
Dr. Terkildsen is active in national organizations dedicated to women’s sexual health and serves as a Fellow of the International Society for the Study of Women’s Sexual Health (ISSWSH), where she contributes on the Fellowship Committee.
Outside of work, Dr. Terkildsen loves to cook, plan parties, and volunteer her time to support women and healthcare professionals running for public office. She and her husband enjoy traveling with their two adult children and spending cozy time at home with their beloved and spoiled cats, Rocky & Adrian.
